Gab - Gab is an ad-free social network dedicated to free speech.
Mobnotes - Mobnotes stands for “mobile notes”.?
Friendica - Decentralisation - Privacy - Interoperability
Meetup - Helps groups of people with shared interests plan events and facilitates off line group meetings in various localities around the world.
PixelFed - PixelFed is a federated image sharing platform, powered by the ActivityPub protocol.
SkillMint - Find, meet and rate people with common skills and interests. Community-driven rating system.